1- nbsp- Answer the following questions based on the P-T phase diagram of carbon dioxide-A- nbsp- At what temperature and pressure can the solid- liquid and vapour phases of CO-2 co-exist in equilibrium-2- Answer the following questions based on the P-T phase diagram of carbon dioxide-B- What is the effect of decrease of pressure on the fusion and boiling point of CO-2-3- nbsp- nbsp- Answer the following questions based on the P-T phase diagram of carbon dioxide-C- What are the critical temperature and pressure for CO-2- nbsp-What is their significance-4- nbsp- Answer the following questions based on the P-T phase diagram of carbon dioxide-D- Is CO-2 solid- liquid or gas at -a-70-C under 1-atm-b-60-C under 10atm-c-15-C under 56-atm- nbsp-

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Temparature & Thermometer

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Question

1) Answer the following questions based on the \(P-T\) phase diagram of carbon dioxide:
A) At what temperature and pressure can the solid, liquid and vapour phases of \(CO_2\) co-exist in equilibrium?

2) Answer the following questions based on the \(P-T\) phase diagram of carbon dioxide:
B) What is the effect of decrease of pressure on the fusion and boiling point of \(CO_2\)?

3) Answer the following questions based on the \(P-T\) phase diagram of carbon dioxide:

C) What are the critical temperature and pressure for \(CO_2?\)
What is their significance?

4) Answer the following questions based on the \(P-T\) phase diagram of carbon dioxide:

D) Is \(CO_2\) solid, liquid or gas at \((a)-70^{\circ}C\) under \(1~\text{atm},(b)-60^{\circ}C\) under \(10\text{atm}~,(c)15^{\circ}C\) under \(56~\text{atm}?\)

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Solution

1) The \(P-T\) phase diagram for \(CO_2\) is shown in the following figure. \(C\) is the triple point of the \(CO_2\) phase diagram. This means that at the temperature and pressure corresponding to this point\((i.e.,\text{at}-56.6^{\circ}C~\text{and}5.11\text{atm}),\) the solid, liquid, and vaporous phases of \(CO_2\) co-exist in equilibrium.

2) The fusion and boliling point of \(CO_2\) decrease with a decrease in pressure as can be seen from the graph.

3) The critical temperature and critical pressure of \(CO_2~\text{are}~31.1^{\circ}C~\text{and}73\text{atm}\) respectively. If the temperature of carbon dioxide is more than \(31.1^{\circ}C,\) it can not be liquefied, however large pressure we may apply.

4) It can be seen from the \(P_T\) phase diagram of \(CO_2\) that:
(a) \(CO_2~\text{is gaseous at}-70^{\circ}C,~\text{under 1 atm pressure.}\)
(b) \(CO_2 \text{is solid at}-60^{\circ}C,~\text{under}10~atm\text{pressure.}\)
(c) \(CO_2\text{is liquid at}15^{\circ}C,\text{under}~56~atm~\text{pressure.}\)

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Similar questions

Answer the following questions based on the P-T phase diagram of carbon dioxide:

(a) At what temperature and pressure can the solid, liquid and vapour phases of CO₂ co-exist in equilibrium?

(b) What is the effect of decrease of pressure on the fusion and boiling point of CO₂?

(d) Is CO₂ solid, liquid or gas at (a) –70 °C under 1 atm, (b) –60 °C under 10 atm, (c) 15 °C under 56 atm?

Q. Answer the following questions based on the P-T phase diagram of carbon dioxide:

(a) At what temperature and pressure can the solid, liquid and vapour phases of

C O_{2}

co-exits in equilibrium ?

(b) What is the effect of decrease of pressure on the fusion and boiling point of

C O_{2}

C O_{2}

? what is their significance ?

(d) Is

C O_{2}

solid, liquid or gas at (a)

- 70^{o} C

under 1 atm, (b)

- 60^{o} C

under 10 atm, (c)

15^{o} C

under 56 atm ?

Q. Answer the following questions based on the P – T phase diagram of CO2: (a) CO2 at 1 atm pressure and temperature – 60 °C is compressed isothermally. Does it go through a liquid phase ? (b) What happens when CO2 at 4 atm pressure is cooled from room temperature at constant pressure ? (c) Describe qualitatively the changes in a given mass of solid CO2 at 10 atm pressure and temperature –65 °C as it is heated up to room temperature at constant pressure. (d) CO2 is heated to a temperature 70 °C and compressed isothermally. What changes in its properties do you expect to observe ?

Q. Answer the following questions based on the P-T phase diagram of

C O_{2}

(a)

C O_{2}

at 1 atm pressure and temperature

- 60^{o} C

is compressed isothermally. Does it go through a liquid phase?
(b) What happens when

C O_{2}

at 4 atm pressure is cooled from room temperature at constant pressure?

C O_{2}

at 10 atm pressure and temperature

- 65^{o} C

as it is heated up to room temperature at constant pressure .

(d)

C O_{2}

is heated to a temperature

70^{o} C

and compressed isothermally. What changes in its properties do you expect to observe?

Q. 1) Answer the following question based on the

P - T

phase diagram of

C O_{2} :

C O_{2}

1 atm

pressure and temperature

- 60^{\circ} C

is compressed isothermally. Does it go through a liquid phase?

2) Answer the following question based on the

P - T

phase diagram of

C O_{2} :

B) What happens when

C O_{2}

4 atm

pressure is cooled from room temperature at constant pressure?

3) Answer the following question based on the

P - T

phase diagram of

C O_{2} :

C) Describe qualitatively the changes in a given mass of solid

C O_{2}

10 atm

pressure and temperature

- 65^{\circ} C

as it is heated up to room temperature at constant pressure.

4) Answer the following question based on the

P - T

phase diagram of

C O_{2} :

C O_{2}

is heated to a temperature

70^{\circ} C

and compressed isothermally. What changes in its properties do you expect to observe?

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